: Problem 6: Ali is planning to deposit 10 annual deposits of $1000 starting now. The bank uses 10% annual interest rate. What will be in the account at the end of year 12? Problem 7: Reem plans to buy a car at end of 2026. The cost of the car is expected to be 105,000. She plans to deposit equal annual amounts starting from end of year 2020. Assuming the interest rate is 8%, What is the annual amount that she needs to pay? Problem 8: The maintenance of the XGS machine is expected to be 3000 in the first year and the cost will increase by 200 each year for the ten following years. The machine is expected to be used for ten years. The company wants to estimate the amount that can be set aside now to cover the maintenance cost of the machine over the following ten years. Assume 6% annual interest rate. Problem 9: The maintenance of the XGM machine is expected to be 4000 in the first year and the cost will increase by 10% each year for the following years. The machine is expected to be used for ten years. The company wants to estimate the amount that can be set aside now to cover the maintenance cost of the machine over the following ten years. Assume 5% annual interest rate. Problem 10: Bayan invested $10,000 ten years ago. The investment worth $22,000 now. What is the annual interest rate for this investment?